Average LBA model parameter estimates for the older and younger participants
| Elderly | Young | |
|---|---|---|
| Mean drift rate: accumulator corresponding to the correct response | 3.05 (0.18) | 2.53 (0.13) |
| Mean drift rate: accumulator corresponding to the incorrect response | 1.57 (0.23) | 0.69 (0.19) |
| Size of start point distribution (A) | 1.33 (0.13) | 0.73 (0.079) |
| Non-decision time (t0) | 0.292 (0.028) | 0.286 (0.011) |
| Response threshold (b, accuracy condition) | 1.86 (0.24) | 0.976 (0.094) |
| Response threshold (b, neutral condition) | 1.71 (0.21) | 0.914 (0.091) |
| Response threshold (b, speed condition) | 1.36 (0.15) | 0.76 (0.792) |
Numbers in parentheses show SEs under the assumption of normal sampling distributions.